Hat liner



FIG. 1 is a front view of a hat liner showing my new design;

FIG. 2 is a rear view of the hat liner;

FIG. 3 is a right side view of the hat liner;

FIG. 4 is a left side view of the hat liner;

FIG. 5 is a top view of the hat liner;

FIG. 6 is a bottom view of the hat liner; and,

FIG. 7 is a top front side perspective view of the hat liner.

Broken lines within the drawing figures are illustrative of stitchingforming part of the claimed design.

CLAIM The ornamental design for a hat liner, as shown and described.